While working at General Dynamics Electric Boat, I was working on a project that had to go on a certain submarine. Due to failures of prototype testing and the time needed to re-design the prototype, it couldn’t go on the targeted submarine. We explained this to all stakeholders and ended up targeting another submarine that was similar to put our prototype on. I believe it is very important to stay on track and meet all milestones, but things go wrong in life. Its more important to be able to quickly come up with another plan and ensure that the project proceeds.